skf energy efficient y-bearings and units

SKF Energy Efficient Y-bearings and unitsMinimize friction and maximize service life for optimized field performance

The Power of Knowledge Engineering

SKF EnCompass Field Performance Programme: theory meets realityOne might think that two bearings of the same size with the same dynamic load rating should perform equally well in a given application. In reality, they often do not. The reason?

Bearing performance under actual operating conditions is impacted by not only the dynamic load rating (C), but far more by the bearing’s inherent design and quality: everything from the surface finish of the raceways to the effectiveness of sealing and lubrication.

The SKF EnCompass Field Performance Programme addresses this issue. By focusing on bearing design optimization and more detailed analysis of the factors influencing bearing service life, the programme will help to meet real-world application conditions.

At the heart of SKF EnCompass are new, more inclusive bearing life models, including the SKF Generalized Bearing Life Model, which separates sub-surface and surface failure modes. By encompassing more of the factors that impact bearing service life, this model and new software tools provide new insight into the calculation of bearing rating life. The result is a significantly improved guide for selecting bearings for optimum reliability and productivity in the field.

As part of the SKF EnCompass programme, SKF Energy Efficient (E2) Y-bearings and units have been optimized to give you a field advantage.

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The expanded SKF Energy Efficient (E2) Y-bearings and Y-bearing units line offers cost-effective solutions for reduced friction, reduced operating temperature and longer service life compared to standard Y-bearings.

SKF E2 Y-bearingsTo meet the ever-increasing demand to reduce friction and energy use, SKF E2 Y-bearings are characterized by a frictional moment that is at least 50% lower when compared to the same-sized standard Y-bearing. This substantial reduction of the frictional moment is achieved by a highly effective contact seal and applying a specially formulated, low-friction grease. Due to the reduced frictional moment, SKF E2 Y-bearings run at up to 30 °C (55 °F) cooler than standard bearings, extending grease life and service life, where grease life is limiting.

Reduce total cost of ownership with SKF E2 Y-bearing units In addition to the energy savings offered by SKF E2 Y-bearings, we have expanded our offering to meet more application needs for more customers. We now provide fully assembled SKF E2 Y-bearing units combining SKF E2 Y-bearings and SKF composite housings. Helping to reduce total cost of ownership, these lightweight, cost-effective and ready-to-mount units are particularly well suited for applications where high speeds, moderate loads, reliability and minimal maintenance are all key parameters.

Available with different combinations of SKF E2 Y-bearings and SKF composite housings, SKF E2 Y-bearing units are relubrication-free. They can be optimized for specific applications and conditions, helping customers reduce energy use and total cost of ownership.

Benefits• Reduced energy use• Reduced grease consumption• Reduced environmental impact• Longer service life• Reduced maintenance• Easy mounting• Cost-effective

Typical applications• Conveyors• Industrial fans• Textile machinery

Optimized to reduce energy use and increase service life

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SKF E2 Y-bearings

Engineered to promote sustainabilityAs the need to conserve energy becomes more important every day, any techno-logy that enables even a small reduction in energy consumption is big news.

Drawing on over 100 years of engineer-ing knowledge and unmatched expert-ise in the field of tribology and related sciences, SKF has created low-friction SKF Energy Efficient (E2) bearings.

Reduce friction – reduce energy useThe SKF Energy Efficient (E2) bearings are characterized by a minimum 30% reduction in the bearing’s frictional moment when compared to a same-size SKF basic design bearing. However, in laboratory tests, SKF E2 Y-bearings have been shown to reduce frictional losses by at least 50%. This significant reduction in frictional losses is due, in part, to a new contact seal and a new, low-friction grease.

Longer service life lowers cost of ownershipOptimized to reduce frictional losses, SKF E2 Y-bearings will, in many applications, last longer than the same-size SKF basic design bearings. Depending on the operating conditions, the bearings will run up to 30 °C (55 °F) cooler. This will extend the service life of the grease, offering the potential to prolong the service life of the bearing when grease life is limiting. SKF E2 bearings are dimensionally inter-changeable with SKF basic design bearings enabling easy upgrades of existing applications as well as improv-ing the energy efficiency of new applications. SKF E2 Y-bearings are available in the YAR 2, YET 2 and YSP 2 series in both metric and inch sizes.

Test resultsIn tests conducted at SKF laboratories, the frictional moment and operating temperature of SKF E2 bearings were compared to same-size SKF basic design Y-bearings. The tests were designed to simulate common Y-bear-ing applications like industrial fans, conveyors and textile machines.

Frictional moment [%] size 204

Speed [r/min]


Speed [r/min]


Speed [r/min]

Diagram 1

n SKF Y-bearings basic design n SKF E2 Y-bearings

1009080706050403020100

500 800 1 800 3 000

1009080706050403020100

500 800 1 800 3 000

1009080706050403020100

500 800 1 800 3 000

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SKF E2 Y-bearingsFrictional momentThe frictional moment of different size SKF E2 Y-bearings was measured at various speeds and compared to basic design SKF Y-bearings. The results (→ diagram 1) showed that for SKF E2 Y-bearings, there was a reduction in the frictional moment of at least 50% and in some cases the reduction was as high as 75%.

Operating temperatureIn laboratory tests, the operating temperature of SKF E2 Y-bearings was compared to SKF basic design bearings under the same load and speed conditions. The tests showed (→ diagram 2) that SKF E2 bearings, depending on their speed, operate anywhere from 5 to 30 °C (40 to 85 °F) cooler than basic design bearings.

Grease service lifeReducing the operating temperature of a bearing has a significant impact on grease service life. As a rule of thumb, reducing the operating temperature by 15 °C (59 °F) doubles the service life of a grease. However, other factors that increase or decrease grease service life must be taken into consideration, including the particular grease being used, ambient temperature, operating temperature, load, speed and misalign-ment. Diagram 3 shows the influence of temperature on grease service life.

1009080706050403020100

500 800 1 800 3 000

Operating temperature [°C] size 204

Speed [r/min]

1009080706050403020100

500 800 1 800 3 000


Speed [r/min]

1009080706050403020100

500 800 1 800 3 000


Speed [r/min]

200190180170160150140130120110100

585†80

1085†75

1585†70

Diagram 3

Influence of operating temperature on grease service life

Grease life [%]

Operating temperature reduction [°C]

Diagram 2

n SKF Y-bearings basic design n SKF E2 Y-bearings

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SKF E2 Y-bearing units

Fig. 2 Fig. 3

A composite housingThe SKF E2 Y-bearing units are com-posed of an SKF E2 Y-bearing and a composite housing made from a glass fibre reinforced polyamide material (→ fig. 1). These lightweight housings resist a variety of chemicals and diluted acids.

For durability, mechanical strength and thermal stability, SKF E2 Y-bearing units are reinforced with a steel coil moulded around the bearing bore and zinc coated steel liners in the mounting bolt holes. Consequently the radial breaking load is far greater than the basic static load rating of the SKF Y-bearing that can be fitted into it.

Long and reliable service lifeSKF E2 Y-bearings are sealed and pre-lubricated with SKF GE2 grease, a low-noise, low-friction lithium-based grease and, under normal operating conditions, are considered to be lubric-ated for the life of the bearing. This long lasting, water-resistant grease combined with the highly effective integral seals and high performance design of appro-priately selected SKF E2 Y-bearings can provide long, reliable service life without the costs and environmental issues of relubrication.

End covers: secure fit, operator safetyTo comply with health and safety regula-tions, the SKF E2 Y-bearing units can be supplied with effective ECY end covers (→ fig. 2). The ECY end covers are made from polypropylene (PP), have good resistance to most chemicals and can withstand operating temperatures up to 100 °C. They can be snapped into the recesses provided in the housing bore.

Note that the end covers are not included with the Y-bearing units and must be ordered separately.

As a further option, the SKF E2 Y-bear-ing units can be also equipped with the white-coloured ECW design end covers (→ fig. 3). The ECW cover has an optional drainage hole that can be easily opened by the user as required. To determine the appropriate ECW end cover, please contact SKF application engineering service.

NOTE: Besides the SKF E2 Y-bearing units, the SKF composite housings are also available assembled with standard Y-bearings in YAR (grub screws) design. They can also be assembled with all available Y-bearing designs and materials including zinc coated and stainless steel bearings.

Please ask your sales representative for information.

Fig. 1

+ =SKF E2 Y-bearings SKF composite housings SKF E2 Y-bearing units

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Long-lasting, low-noise, low-friction high quality lithium-based grease for long and reliable service life

The spherical outside surface of the bearing and matching housing bore accommodate initial misalignment up to 5°

The inner ring, can be extended on one or both sides depending on the locking method

The coil provides additional mechanical strength and thermal stability

Mounting bolt holes reinforced with corrosion resistant Cr6 free zinc coated steel inserts for mechanical strength and thermal stability

Dimensionally interchangeable with cast iron housings that conform to ISO 3228

SKF E2 Y-bearing with low-friction seals

Material up to 75% lighter than cast iron. Good resistance to chemicals and diluted acids

Housing highlights• Excellent corrosion resistance• Tolerant of high and low

temperatures• Lightweight• Dimensionally interchangeable

with cast iron units • Excellent UV resistance• Paintable• Recyclable • Available with end covers

Fig. 4 Fig. 5 Fig. 6

The SKF E2 Y-bearing units are available with plummer block (→ fig. 4), square flanged (→ fig. 5) or oval flanged (→ fig. 6) housings

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Technical recommendationsMain applicationsSKF E2 Y-bearings and units are intended for those applications where reduced energy use is an important issue. Under normal operating condi-tions, these bearings run at lower temperature and have a considerably longer grease service life than an SKF standard design bearing. They can therefore also offer significantly reduced lubricant consumption where standard design bearings require relubrication. Typical applications include:

• conveyors• industrial fans• textile machinery

Calculating rated fatigue life for SKF bearingsThe method used to calculate rated fatigue life is the same for both SKF E2 Y-bearings and basic design SKF Y-bearings. SKF recommends using the SKF rating life equations as described in the SKF Rolling bearings catalogue or online at skf.com.

Estimating grease service lifeThe service life of the grease in SKF E2 Y-bearings can be estimated using diagram 4. The estimate is based on an L10 grease life. This is defined as the period of time, at the end of which, 90% of a sufficiently large group of virtually identical bearings are still reliably lubricated.

The diagram provides grease life estimates based on operating temper-ature and speed and is valid under the following operating conditions:

• horizontal shaft• very light to moderate loads

(P ≤ 0,05 C)• stationary machine• low vibration levelsIf operating conditions differ, the grease life obtained from the diagram has to be adjusted as follows:

• For vertical shafts, use 50% of the value from the diagram

• For heavier loads (P > 0,05 C), use the reduction factors listed in table 1

The values for adjusting grease life are guideline values only and should not be used as a substitute for testing the bearing and grease in its application.

For additional information, refer to the chapter “Lubrication” in the SKF Rolling bearings catalogue or contact the SKF application engineering service.

Table 1

Reduction factor for the grease life, depending on the load

Load P Reduction factor

≤ 0,05 C 10,1 C 0,7

0,125 C 0,50,25 C 0,2

Table 2

Bearing mean diameter dm

Bearing size1) Mean bearing diameter dm

– mm

04 33,505 39

06 4607 53,508 60

09 65

1) For example: bearing size 06 includes all bearings based on a Y 206 bearing, such as E2.YAR 206-2F, E2.YAR 206-101-2F, E2.YAR 206-102-2F, E2.YAR 206-103-2F, E2.YAR 206-104-2F

dm

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Technical recommendationsRelubrication of the bearingDue to the effectiveness of the seal combined with lower operating temper-atures, grease service life is sufficient under normal operating conditions for SKF E2 Y-bearings to be considered relubrication-free.

Relubrication can, however, extend service life where exceptional operating conditions mean that grease life would otherwise be limiting, for example where high loads, speeds, operating temperatures, levels of vibration or contamination prevail. Please contact the SKF application engineering service for more information.

NOTE: Although SKF E2 Y-bearings can be relubricated through holes provided for this purpose in their outer rings, the composite housings in which they are mounted when supplied as units do not have provision for relubrication. Therefore, if it is required for SKF E2 Y-bearings to be relubricated in service, they must be used separately from SKF composite housings.

To maintain the benefits of the SKF Energy Efficient solutions, SKF E2 Y-bearings should be relubric-ated with SKF LEGE 2 low-friction grease.

When relubricating, the shaft should be turned and grease should be pumped slowly until fresh grease starts to escape from the seal(s).

NOTE: Pumping too quickly can build up excessive pressure and damage the seals.

Diagram 4

Grease life for SKF Energy Efficient Y-bearingswhere load P = 0,05 C

Operating temperature [°C (°F)]

10 000

7 0005 000

3 000

2 000

100 000

70 00050 000

30 000

20 000

1 000 50 60 70 80 90 100 110 120 (120) (140) (160) (175) (195) (210) (230) (250)

n dm = 20 000 50 000

n dm = 100 000 150 000 200 000 250 000 300 000 350 000

n = rotational speed [r/min] dm = mean diameter [mm] → table 2

Grease life L10 [h]

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Product dataSKF E2 Y-bearingsSKF E2 Y-bearings are available in three different series with different locking methods. E2.YAR 2 bearings, with the grub screw locking method, and E2.YET 2, with the eccentric collar locking method, are available for metric shafts from 20 to 45 mm and for inch shafts from 3/4 to 1 3/4 for inches. E2.YSP 2 bearings, with the SKF ConCentra locking method, are available for metric shafts from 25 to 45 mm and for inch shafts from 1 to 1 11/16 inches.

Additions to the assortment will be based on customer demand. For the most up-to-date information, contact your local SKF representative or visit skf.com/bearings.

Designs Seals and grease fillSKF E2 Y-bearings are supplied with a low-friction contact seal.

The seal is fitted in a recess in the bearing outer ring and seals against the inner ring land. The seal is made from acrylonitrile-butadiene rubber and reinforced with a sheet steel insert.

The seal lip, which has a thin and flexible design, minimizes the frictional moment, while effectively protecting the bearing from contaminants. The sheet steel insert protects against solid contaminants.

Bearings in the E2.YAR 2 and E2.YSP 2 series use the new low-friction contact seal design but also have a plain sheet steel flinger on the outboard side of the seal. The flinger, which has an interfer-ence fit on the inner ring, further protects the seal lip without increasing friction.

SKF E2 Y-bearings are supplied filled with a special low-noise, low-friction SKF grease (→ table 3).

CagesSKF E2 Y-bearings are fitted with a ball centred snap-type cage made of a glass fibre reinforced composite polymer.

Fig. 7

–50 0 50 100 150 200 250 °C

0 100 200 300 400 500 °F –50 50 150 250 350 450

–50 0 50 100 150 200 250 °C

0 100 200 300 400 500 °F –50 50 150 250 350 450

Table 3

Technical specifications of SKF GE2 grease

Grease

Temperature range1)

Thickener

Base oil type

NLGI consistency class

Base oil viscosity [mm2/s] at 40 °C at 100 °C (105 °F) (210 °F)

GE2 Lithium soap Synthetic 2 25 4,9

1) Refer to the SKF traffic light concept → skf.com/bearings

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Product dataBearing dataDimensions and tolerancesSKF E2 Y-bearings are dimensionally interchangeable with basic design SKF Y-bearings and are manufactured according to the precision class defined in ISO 9628.

Load carrying capacitySKF E2 Y-bearings have the same basic dynamic and static load ratings as same-size SKF basic design Y-bearings.

Permissible speedsSKF E2 Y-bearings should not operate above the limiting speeds listed in the product tables. For Y-bearings with grub screws or an eccentric locking collar, the permissible speed is influenced by the shaft tolerance. When using these bearings on shafts with wider tolerances than h6, compare the speed values listed in the product tables with those in table 4. The lower value is the permiss-ible speed.

For applications operating at higher speeds or when low vibration levels or quiet running are required, SKF recommends using SKF E2 bearings with SKF ConCentra locking technology.

Internal clearanceSKF E2 Y-bearings in the YAR 2 and YET 2 series are manufactured with a radial internal clearance in accordance with ISO 9628: Group N. SKF E2 Y-bearings in the YSP 2 series are manufactured with a radial internal clearance in accordance with ISO 9628: Group 3 (→ table 5).

Table 4

Permissible speeds for SKF E2 Y-bearings with grub screws or an eccentric locking collar

Bearing size1) Permissible speed for shafts machined to tolerance classh7� h8� h9� h11�

– r/min

04 5 300 3 800 1 300 85005 4 500 3 200 1 000 700

06 4 000 2 800 900 63007 3 400 2 200 750 53008 3 000 1 900 670 480

09 2 600 1 700 600 430

Table 5

Radial internal clearance for SKF E2 Y-bearings

Bearing size1) Radial internal clearance of Y-bearings in the seriesE2.YAR 2, E2.YET 2 E2.YSP 2

from to min. max. min. max.

– mm

04 04 12 28 – –05 06 12 28 23 41

07 08 13 33 28 4609 14 36 30 51

1) For example: bearing size 06 includes all bearings based on a Y 206 bearing, such as E2.YAR 206-2F, E2.YAR 206-101-2F, E2.YAR 206-102-2F, E2.YAR 206-103-2F, E2.YAR 206-104-2F

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Product dataSKF E2 Y-bearing unitsAxial displacementSKF E2 Y-bearing units can accommod-ate only very limited axial displacement resulting, for example, from thermal elongation of the shaft. The distance between bearing positions should therefore be short or the units should be supported by resilient sheet metal support surfaces or walls to prevent them from being subjected to excessive stresses as a result of thermal elonga-tion of the shaft.

MisalignmentSKF E2 Y-bearing units can accommod-ate initial misalignment of up to 5°. Additionally, operational shaft deflec-tions of a few minutes or arc can be permitted.

Support surfacesTo maximize the service life of SKF E2 Y-bearings units, SKF recom-mends finishing support surfaces to a roughness of Ra ≤ 12,5 μm and a flatness (planicity) that meets IT7 specifications. For moderate demands IT8 may be satisfactory.

Attaching to the support surfaceTo attach SKF E2 Y-bearing units to the support surface, SKF recommends using 8.8 class bolts or studs and a washer to ISO 7089:2000 or 7090:2000 and a spring washer. Hexagonal head bolts in accordance with ISO 4014:1999 are appropriate. Alternatively, hexagonal socket head cap screws in accordance with ISO 4762:1988 can be used (→ fig. 8).

Recommended fastener metric thread sizes are listed in product tables. SKF E2 Y-bearing units with plummer block housings have two bolt holes in their base for attachment bolts. SKF E2 Y-bearing units with a flanged housing have a recess (→ fig. 9), at the back for accurate positioning, on an appropriate centring ring provided by one of the following methods:

• machining the wall accordingly (→ fig. 10)

• attaching an appropriate centring ring to the wall (→ fig. 11). A centring ring relieves the attachment bolts of radial loads

Fig. 8

Da H11

Fig. 9

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DimensionsThe boundary dimensions of SKF E2 Y-bearings housings conform to ISO 3228:1993. The housings are dimensionally interchangeable with SKF Y-bearing plummer block housings in the SY series and SKF Y-bearing flanged housings in the FY, FYT, FYTB series.

TolerancesSKF E2 Y-bearing units with plummer block housings (SYK series)The tolerances for the shaft centre height H1 (→ fig. 12) above the support surface are:

• ± 0,25 mm for units with a bore diameter up to and including 40 mm

The tolerance for the shaft centre height corresponds to the values specified in ISO 3228:1993.

SKF E2 Y-bearing units with flanged housings (FYK, FYTBK series)The tolerance for the total width T of the unit (→ fig. 13) is ± 0,5.

Load carrying abilitySKF E2 Y-bearing units are able to withstand the same dynamic and static loads as the SKF E2 Y-bearings they incorporate. These Y-bearing units can also be used in applications where shock loads or variable axial loads occur.

T

H1

Fig. 13

Fig. 12

Fig. 10

Fig. 11

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Locking methodsThe SKF E2 Y-bearings and units are available with three different locking methods.

Grub screw lockingThis locking method is based on two grub (set) screws positioned 120° apart on the inner ring (→ fig 14). The lock is achieved by tightening the two-cup point hexagonal grub screws to the recommended torque value. This method enables very easy mounting and dismounting, even if space is limited. This locking method is typically used in applications where the direction of rotation alternates.

Eccentric locking collarSKF E2 Y-bearings with an eccentric locking collar are intended primarily for use in applications where the direction of rotation is constant. On one side, the extended inner ring of the bearing has an eccentric step (→ fig 15). The step accommodates the locking collar. Turning the locking collar in the direc-tion of rotation locks the collar and bearing onto the shaft. A single grub screw further secures the collar to the shaft.

The SKF ConCentra locking methodSKF E2 Y-bearings with SKF ConCentra locking method have an inner ring symmetrically extended on both sides. The patented SKF ConCentra locking technology is based on the expansion and contraction of two mating surfaces: the bearing bore and the external surface of the stepped sleeve. Both surfaces have precision-engineered serrations.

When the grub screws in the mounting collar are tightened, the inner ring is displaced axially relative to the stepped sleeve (→ fig 16). This forces the bearing inner ring to expand and the stepped sleeve to contract evenly, providing a true concentric fit on the shaft. SKF ConCentra Y-bearings provide an easy, quick and reliable way to lock a bearing onto a shaft.

The true concentric fit on the shaft reduces noise and vibration levels and virtually eliminates fretting corrosion. Even more important is that the fit on the shaft does not loosen, even in applications where there are heavy loads and/or high speeds. The shaft tolerance does not limit the permissible bearing speed and the full limiting speed can be achieved, even when using commercial grade shafts. The bearings can be used in applications for both constant and alternating direction of rotation.

Fig. 14

Fig. 15

Fig. 16

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Mounting and dismountingWhen mounting Y-bearings on a shaft, suitable tools should be used. For SKF E2 Y-bearings and units with SKF ConCentra locking method, mounting kits are available from SKF (designation 626830) which include mounting instructions, hexagonal keys and torque indicators. SKF ConCentra mounting kits have to be ordered separately from the bearing or unit.

Mounting instructions1 Remove any burrs on the shaft with

emery cloth or a fine file, wipe clean with a cloth and check the shaft diameter (→ fig. 17).

2 Mount any components on the shaft that are between the two bearings or unit positions.

3 Clean the base of the unit and its support surface (→ fig. 18), making sure that the support surface is flat and smooth. Flatness should be within IT7 and roughness Ra ≤ 12,5 mm. In case of pillow block units, if the elevation must be adjusted by shims, the shims must extend the full length and width of the base of the unit.

4 Slide the first bearing unit onto the shaft orientating it to make sure that the locking device will be accessible for tightening (→ fig. 19). NOTE: The locking collars of E2 Y-bearing units with eccentric collar locking are separate prior to mount-ing. In case these units have to be mounted with their locking device inboard or if access to the locking side of the inner ring of these units will not be available, it will be necessary to slide the locking collar onto the shaft, in the correct orientation prior to, or when mounting the unit.

Fig. 17

Fig. 18

Fig. 19

! Read these instructions completely prior to starting work

NOTE: SKF E2 Y-bearing units are product assemblies. For SKF E2 Y-bearing units, with the SKF ConCentra locking method, no attempt should be made to disassemble the sleeve and the mounting collar from the bearing prior to installation.

These mounting instructions will allow you to achieve an appropriate fit to a shaft complying with SKF diameter tolerance recommenda-tions. Please refer to SKF catalogue Y-bearings and Y-bearing units or skf.com. For SKF E2 Y-bearings with SKF ConCentra locking method, following these mounting instructions will achieve a concentric fit with the appropriate degree of interference to commercial grade shafts.

When mounting OR dismounting, SKF recommends removing all the weight from the bearing using slings or jacks, and securing the shaft to prevent it from rotating.

! WARNING!To minimize the risk of injury during

mounting or dismounting, turn off power and perform lockout/tagout procedures so that machine does not unexpectedly start.

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Mounting and dismounting5 Locate the second bearing unit on the

shaft following steps 3 and 4. For pillow block units, carefully align both units and then fully tighten the attachment bolts in the housing base. Fasten flanged units securely to the machine wall using, when available, the centring recess machined at the housing back.

6 Align the shaft in the bearing arrangement axially and, if possible, turn it a few times.

7 Secure the bearing units to the shaft by tightening the bearing locking device. 7.1 Grub screws locking device

Tighten the grub screws in the inner rings of both units to the tightening torque indicated in table 6.

7.2 Eccentric locking collar – Place the eccentric locking collars on the inner ring extension of both Y-bearing units and rotate to tighten them against the inner ring, in the main direction of rotation.

– Tighten the locking collars to their final position, using a hook spanner engaging the hole in the circumference of the collar.

– Tighten the grub screw in the eccentric locking collars of both Y-bearing units to the tightening torque indicated in table 6.

7.3 SKF ConCentra – Start to secure the first bearing unit to the shaft by positioning the collar so that a grub screw is directly opposite the split in the sleeve. Tighten the screws finger tight, holding the short leg of the supplied hexagonal key (→ fig. 20).

– Tighten the screws 1/4 turn following the tightening pattern in fig. 21. Do this twice. Then tighten each set screw, starting with the screw opposite the split in the sleeve, until the long end of the hexagonal key comes in contact with the supplied torque indicator (→ fig. 22) or to the recommended torque value shown in table 7.

– Secure the second bearing unit to the shaft repeating the above two steps. Make sure the shaft turns smoothly and the bearings are not jammed. If the shaft does not turn smoothly, loosen one of the bearing units following the dismounting instructions and secure it again.

8 If applicable, snap the end cover in place.

Fig. 20

Fig. 21

Fig. 22

! CAUTION!Do not use auxiliary equipment such as

a hammer or pipe to tighten the screws.

16

Dismounting instructions1 It may be necessary to clean the shaft

extension with emery cloth to remove rust or repair surface damage.

2 Unlock the bearing units from the shaft by releasing the bearing locking device. 2.1 Grub screws locking device

– Loosen the screws on both the units.

– Loosen and remove the attach-ment bolts and slide the units off the shaft.

2.2 Eccentric locking collar – Loosen the screw in the eccentric locking collars of both the units.

– Rotate the eccentric locking collars and slide them off the shaft.

– Loosen and remove the attach-ment bolts and slide the units off the shaft.

2.3 SKF ConCentra – Loosen the screws on the first unit.

– Lightly tap the sleeve edge on the mounting collar side of the bearing until the locking system releases the shaft. As an alternat-ive, tap on the bearing inner ring side face on the side opposite the collar.

– Loosen and remove the attach-ment bolts and slide the unit off the shaft.

– Repeat the above 3 steps for the second unit.

SW

SW

Table 6

Hexagonal keys to tighten grub screws in inner rings or eccentric locking collars – sizes and tightening torques

Bearing size1)

Bearing or unit with metric bore

Bearing or unit with inch bore

Hex key size SW

Tightening torque

Hex key size SW

Tightening torque

– mm Nm inch Nm

Bearings in the E2.YAR series, units with designation suffix TEF

04 3 4 1/8 405 3 4 1/8 4

06 3 4 1/8 407 3 4 5/32 6,508 4 6,5 5/32 6,5

09 4 6,5 5/32 6,5

Bearing size1)

Bearing or unit with metric bore

Bearing or unit with inch bore

Hex key size SW

Tightening torque

Hex key size SW

Tightening torque

– mm Nm inch Nm

Bearings in the E2.YET series, units with designation suffix FE

04 3 4 1/8 405 3 4 1/8 4

06 4 6,5 5/32 6,507 5 16,5 3/16 16,508 5 16,5 3/16 16,5

09 5 16,5 3/16 16,5

1) For example: bearing size 06 includes all bearings based on a Y 206 bearing, such as: E2.YAR 206-101-2F, E2.YAR 206-102-2F, E2.YAR 206-2F, E2.YAR 206-103-2F, E2.YAR 206-104-2F

Table 7

Recommended tightening torque values for SKF ConCentra locking system

Bearing size 1) Screw size

Recommended torque

from to high

– – Nm/in.lbf

05 06 M5 4,2/3707 09 M6 7,4/66

1) For example: bearing size 07 includes all bearings based on a Y 207 e.g. E2. YSP 207 SB-2F, E2. YSP 207-104 SB-2F, E2. YSP 207-106 SB-2F, E2. YSP 207-107 SB-2F

17

DesignationsThe complete designation for the SKF E2 Y-bearings and SKF E2 Y-bearing units consists of:

• Prefix “E2.” for the E2 Y-bearings only • Prefixes, identifying the Y-bearings or

Y-bearing units series• Figures, identifying the sizes• Suffixes, identifying design and

variantsMore details about SKF E2 Y-bearings and SKF E2 Y-bearing units can be obtained in tables 8 and 9.

Table 8

Designation system for SKF E2 Y-bearings

Examples E2.YAR 205-2FE2.YET 208E2.YSP 206-103 SB-2F

PrefixesE2 SKF Energy Efficient

Basic designationBearing seriesYAR Bearing with grub screws,

inner ring extended on both sidesYET Bearing with an eccentric-looking collar,

inner ring extended on one sideYSP Bearing with SKF ConCentra locking technology,

inner ring symmetrically extended on both sides

Dimension series2 Outside diameter to ISO 15, diameter series 2

Bore diameter (d)Bearings for metric shafts

04 20 mm bore diameterto

09 45 mm bore diameter

Bearings for inch shaftsThree-digit combination that follows the designation of the basic metric bearing and is separated from this by a hyphen. The first digit is the number of whole inches and the second and third digits are the number of sixteenths of an inch, e.g. 205-100.

–103 1 in. and 3 sixteenth (30,163 mm)

SuffixesInternal DesignSB SKF ConCentra ball bearing, with short inner ring

External design sealing system-2F Contact seal, additional plain flinger on both sides

E2. YAR 2 05 -2FE2. YET 2 08E2. YSP 2 06-103 SB -2F

18

Examples SYK 25 TEFFYK 40 FEFYTBK 30 LEF

Basic designationIdentification of housing typeSY Plummer block housingFY Square flange (4-bolt) housing

Identification of housing design– Base version; when flanged, square flangeTB Flanged unit oval type

Identification of housing materialK Composite

Identification of sizeBearing units for metric shafts: in millimeters uncoded

20 20 mm bore diameterto

40 40 mm bore diameter

SuffixesIdentification of inserted Y-bearingTE SKF E2 Y-bearing with grub screws,

inner ring extended on both sidesFE SKF E2 Y-bearing with an eccentric locking collar,

inner ring extended on one sideLE SKF E2 Y-bearing with SKF ConCentra locking technology,

inner ring symmetrically extended on both sides

External design sealing systemF Seal with flinger on both sides

Table 9

Designation system for SKF E2 Y-bearing units

SY K 25 TE FFY K 40 FEFY TB K 30 LE F

19

D

C

d d1

r1r2

B

s1

SKF E2 Y-bearings with grub screws, metric shaftsd 20 – 45 mm

20 47 31 14 28,2 18,3 0,6 12,7 6,55 0,28 8 500 0,14 E2.YAR 204-2F

25 52 34,1 15 33,7 19,8 0,6 14 7,8 0,335 7 000 0,19 E2.YAR 205-2F

30 62 38,1 18 39,7 22,2 0,6 19,5 11,2 0,475 6 300 0,30 E2.YAR 206-2F

35 72 42,9 19 46,1 25,4 1 25,5 15,3 0,655 5 300 0,44 E2.YAR 207-2F

40 80 49,2 21 51,8 30,2 1 30,7 19 0,8 4 800 0,59 E2.YAR 208-2F

45 85 49,2 22 56,8 30,2 1 33,2 21,6 0,915 4 300 0,65 E2.YAR 209-2F

Dimensions Basic load ratings Fatigue load limit

Limiting speed

Mass Designation

dynamic static with shaft tolerance

d D B C d1 s1 r1,2 C C0 Pu h6

mm min kN kN r/min kg –

20

SKF E2 Y-bearings with grub screws, inch shaftsd 3/4 – 1 3/4 in.

3/4 47 31 14 28,2 18,3 0,6 12,7 6,55 0,28 8 500 0,14 E2.YAR 204-012-2F19,05

7/8 52 34,1 15 33,7 19,8 0,6 14 7,8 0,335 7 000 0,21 E2.YAR 205-014-2F22,225

15/16 52 34,1 15 33,7 19,8 0,6 14 7,8 0,335 7 000 0,2 E2.YAR 205-015-2F23,813

1 52 34,1 15 33,7 19,8 0,6 14 7,8 0,335 7 000 0,18 E2.YAR 205-100-2F25,4

1 1/16 62 38,1 18 39,7 22,2 0,6 19,5 11,2 0,475 6 300 0,34 E2.YAR 206-101-2F26,988

1 1/8 62 38,1 18 39,7 22,2 0,6 19,5 11,2 0,475 6 300 0,32 E2.YAR 206-102-2F28,575

1 3/16 62 38,1 18 39,7 22,2 0,6 19,5 11,2 0,475 6 300 0,29 E2.YAR 206-103-2F30,163

1 1/4 62 38,1 18 39,7 22,2 0,6 19,5 11,2 0,475 6 300 0,27 E2.YAR 206-104-2F31,75 72 42,9 19 46,1 25,4 1 25,5 15,3 0,655 5 300 0,5 E2.YAR 207-104-2F

1 5/16 72 42,9 19 46,1 25,4 1 25,5 15,3 0,655 5 300 0,47 E2.YAR 207-105-2F33,338

1 3/8 72 42,9 19 46,1 25,4 1 25,5 15,3 0,655 5 300 0,44 E2.YAR 207-106-2F34,925

1 7/16 72 42,9 19 46,1 25,4 1 25,5 15,3 0,655 5 300 0,41 E2.YAR 207-107-2F36,513 80 49,2 21 51,8 30,2 1 30,7 19 0,8 4 800 0,68 E2.YAR 208-107-2F

1 1/2 80 49,2 21 51,8 30,2 1 30,7 19 0,8 4 800 0,64 E2.YAR 208-108-2F38,1 85 49,2 22 56,8 30,2 1 33,2 21,6 0,915 4 300 0,82 E2.YAR 209-108-2F

1 9/16 80 49,2 21 51,8 30,2 1 30,7 19 0,8 4 800 0,6 E2.YAR 208-109-2F39,688

1 5/8 85 49,2 22 56,8 30,2 1 33,2 21,6 0,915 4 300 0,75 E2.YAR 209-110-2F41,275

1 11/16 85 49,2 22 56,8 30,2 1 33,2 21,6 0,915 4 300 0,71 E2.YAR 209-111-2F42,863

1 3/4 85 49,2 22 56,8 30,2 1 33,2 21,6 0,915 4 300 0,67 E2.YAR 209-112-2F44,45


Limiting speed

Mass Designation


d D B C d1 s1 r1,2 C C0 Pu h6

in./mm mm min kN kN r/min kg –

D

C

d d1

r1r2

B

s1

21

SKF E2 Y-bearings with an eccentric locking collar, metric shaftsd 20 – 45 mm

20 47 21,5 31 14 28,2 32,4 24,0 0,6 12,7 6,55 0,28 8 500 0,16 E2.YET 204

25 52 21,5 31 15 33,7 37,4 23,5 0,6 14 7,8 0,335 7 000 0,19 E2.YET 205

30 62 23,8 35,7 18 39,7 44,1 26,7 0,6 19,5 11,2 0,475 6 300 0,30 E2.YET 206

35 72 25,4 38,9 19 46,1 51,1 29,4 1 25,5 15,3 0,655 5 300 0,44 E2.YET 207

40 80 30,2 43,7 21 51,8 56,5 33,2 1 30,7 19 0,8 4 800 0,60 E2.YET 208

45 85 30,2 43,7 22 56,8 62 32,7 1 33,2 21,6 0,915 4 300 0,66 E2.YET 209


Limiting speed

Mass Designation


d D B B1 C d1 d2 s1 r1,2 C C0 Pu h6

mm min kN kN r/min kg –

d2D d d1

r1r2

C

B1

s1

B

22

SKF E2 Y-bearings with an eccentric locking collar, inch shaftsd 3/4 – 1 3/4 in.

3/4 47 21,5 31 14 28,2 32,4 24 0,6 12,7 6,55 0,28 8 500 0,16 E2.YET 204-01219,05

1 52 21,5 31 15 33,7 37,4 23,5 0,6 14 7,8 0,335 7 000 0,18 E2.YET 205-10025,4

1 1/8 62 23,8 35,7 18 39,7 44,1 26,7 0,6 19,5 11,2 0,475 6 300 0,32 E2.YET 206-10228,575

1 3/16 62 23,8 35,7 18 39,7 44,1 26,7 0,6 19,5 11,2 0,475 6 300 0,3 E2.YET 206-10330,163

1 1/4 62 23,8 35,7 18 39,7 44,1 26,7 0,6 19,5 11,2 0,475 6 300 0,27 E2.YET 206-10431,75 72 25,4 38,9 19 46,1 51,1 29,4 1 25,5 15,3 0,655 5 300 0,48 E2.YET 207-104

1 3/8 72 25,4 38,9 19 46,1 51,1 29,4 1 25,5 15,3 0,655 5 300 0,43 E2.YET 207-10634,925

1 7/16 72 25,4 38,9 19 46,1 51,1 29,4 1 25,5 15,3 0,655 5 300 0,4 E2.YET 207-10736,513

1 1/2 80 30,2 43,7 21 51,8 56,5 33,2 1 30,7 19 0,8 4 800 0,62 E2.YET 208-10838,1

1 11/16 85 30,2 43,7 22 56,8 62 32,7 1 33,2 21,6 0,915 4 300 0,69 E2.YET 209-11142,863

1 3/4 85 30,2 43,7 22 56,8 62 32,7 1 33,2 21,6 0,915 4 300 0,65 E2.YET 209-11244,45


Limiting speed

Mass Designation


d D B B1 C d1 d2 s1 r1,2 C C0 Pu h6

in./mm mm min kN kN r/min kg –

d2D d d1

r1r2

C

B1

s1

B

23

SKF E2 Y-bearings with SKF ConCentra locking method, metric shaftsd 25 – 45 mm

25 52 33,2 15 33,7 41,7 21,0 14 7,8 0,335 8 500 0,18 E2.YSP 205 SB-2F

30 62 37 18 39,7 48 23,0 19,5 11,2 0,475 7 500 0,3 E2.YSP 206 SB-2F

35 72 39,5 19 46,1 57 24,3 25,5 15,3 0,655 6 300 0,44 E2.YSP 207 SB-2F

40 80 42,9 21 51,8 62 25,9 30,7 19 0,8 5 600 0,59 E2.YSP 208 SB-2F

45 85 44 22 56,8 67 26,5 33,2 21,6 0,915 5 000 0,64 E2.YSP 209 SB-2F


Limiting speed

Mass Designation

dynamic static

d D B11) C d1 d2 s11) C C0 Pu

mm ~ ~ ~ kN kN r/min kg –

d2D d d1

C

B1

s1

1) Width/distance before the grub screw is tightened (sleeve and inner ring bore at starting position).

24

SKF E2 Y-bearings with SKF ConCentra locking method, inch shaftsd 1 – 1 1/16 in.

1 52 33,2 15 33,7 41,7 21 14 7,8 0,335 8 500 0,18 E2.YSP 205-100 SB-2F25,4

1 3/16 62 37 18 39,7 48 23 19,5 11,2 0,475 7 500 0,29 E2.YSP 206-103 SB-2F30,163

1 1/4 72 39,5 19 46,1 57 24,3 25,5 15,3 0,655 6 300 0,49 E2.YSP 207-104 SB-2F31,75

1 3/8 72 39,5 19 46,1 57 24,3 25,5 15,3 0,655 6 300 0,44 E2.YSP 207-106 SB-2F34,925

1 7/16 72 39,5 19 46,1 57 24,3 25,5 15,3 0,655 6 300 0,41 E2.YSP 207-107 SB-2F36,513

1 1/2 80 42,9 21 51,8 62 25,9 30,7 19 0,8 5 600 0,58 E2.YSP 208-108 SB-2F38,1

1 11/16 85 44 22 56,8 67 26,5 33,2 21,6 0,915 5 000 0,69 E2.YSP 209-111 SB-2F42,863


Limiting speed

Mass Designation

dynamic static

d D B11) C d1 d2 s11) C C0 Pu

in./mm mm ~ ~ ~ kN r/min kg –

d2D d d1

C

B1

s1


25

SKF E2 Y-bearing units with square flanged composite housing and eccentric locking collar, for metric shaftsd 20 – 40 mm

20 30 15 31 68,3 63.5 86 12,3 M10 23,9 42,9 18,5

25 31 15 30,9 74,6 70 95 12,3 M10 23,4 42,4 18

30 33 15,3 35,6 93,7 82,5 108 12,3 M10 26,6 46,6 20

35 35 17 38,8 106,4 92 118 14,8 M12 29,3 50,3 22

40 39 17 43,6 115,9 101,5 130 14,8 M12 33,1 57,1 23,5

Dimensions

d A1 A2 B1 Da J L N G s1 T A5

mm

A1

d

T

GJ

L

Da H11

A2

3,2 H14 N

s1

B1

A5

26

12,7 6,55 0,28 8 500 0,28 FYK 504 E2.YET 204 ECY 204 FYK 20 FE

14 7,8 0,335 7 000 0,33 FYK 505 E2.YET 205 ECY 205 FYK 25 FE



30,7 19 0,8 4 800 0,88 FYK 508 E2.YET 208 ECY 208 FYK 40 FE

Basic load ratings Fatigue load limit

Limiting speed

Mass Housing designation

Bearing designation

Appropriate end cover designation

Unit designation

dynamic static

C C0 Pu

kN kN r/min kg – – – –

27

SKF E2 Y-bearing units with square flanged composite housing and SKF ConCentra locking method, for metric shaftsd 25 – 40 mm

25 31 15 33,2 74,6 70 95 12,3 M10 21,2 40,2 18

30 33 15,3 37 93,7 82,5 108 12,3 M10 23,2 43,2 20

35 35 17 39,5 106,4 92 118 14,8 M12 24,5 45,5 22

40 39 17 42,9 115,9 101,5 130 14,8 M12 26,2 50,2 23,5

Dimensions

d A1 A2 B11) Da J L N G s11) T A5

mm ~ ~

A1

d

T

GJ

L

Da H11

A2

3,2 H14 N

s1

B1

A5


28

14 7,8 0,335 8 500 0,32 FYK 505 E2.YSP 205 SB-2F ECY 205 FYK 25 LEF

19,5 11,2 0,475 7 500 0,49 FYK 506 E2.YSP 206 SB-2F ECY 206 FYK 30 LEF

25,5 15,3 0,655 6 300 0,68 FYK 507 E2.YSP 207 SB-2F ECY 207 FYK 35 LEF

30,7 19 0,8 5 600 0,87 FYK 508 E2.YSP 208 SB-2F ECY 208 FYK 40 LEF


Limiting speed


Bearing designation


Unit designation

dynamic static

C C0 Pu


29

SKF E2 Y-bearing units with square flanged composite housing and grub screws, for metric shaftsd 25 – 40 mm

20 30 15 31 68,3 63,5 86 12,3 M10 18,3 37,3 18,5

25 31 15 34,1 74,6 70 95 12,3 M10 19,8 38,8 18

30 33 15,3 38,1 93,7 82,5 108 12,3 M10 22,2 42,2 20

35 35 17 42,9 106,4 92 118 14,8 M12 25,4 46,4 22

40 39 17 49,2 115,9 101,5 130 14,8 M12 30,2 54,2 23,5

Dimensions

d A1 A2 B Da J L N G s1 T A5

mm

A1

d

T

GJ

L

s1

BDa H11

A2

3,2 H14 NA5

30

12,7 6,55 0,28 8 500 0,26 FYK 504 E2.YAR 204-2F ECY 204 FYK 20 TEF

14 7,8 0,335 7 000 0,33 FYK 505 E2.YAR 205-2F ECY 205 FYK 25 TEF



30,7 19 0,8 4 800 0,88 FYK 508 E2.YAR 208-2F ECY 208 FYK 40 TEF


Limiting speed


Bearing designation


Unit designation

dynamic static

C C0 Pu


31

SKF E2 Y-bearing units with oval flanged composite housing and eccentric locking collar, for metric shaftsd 20 – 35 mm

20 29,5 15 31 50,8 112 90 60,5 12,3 M10 23,9 42,9 18.5

25 30 15 30,9 63,5 124 99 70 12,3 M10 23,4 42,4 18

30 33 15 35,6 76,2 142,5 116,5 83 12,3 M10 26,6 46,6 20

35 35 17 38,8 88,9 156 130 96 14,8 M12 29,3 50,3 22

Dimensions

d A1 A2 B1 Da H J L N G s1 T A5

mm

A1

d

T

G

J

L

Da H11

A2

3,2 H14 N

Hs1

B1

H

A5

32

12,7 6,55 0,28 8 500 0,24 FYTBK 504 E2.YET 204 ECY 204 FYTBK 20 FE

14 7,8 0,335 7 000 0,29 FYTBK 505 E2.YET 205 ECY 205 FYTBK 25 FE




Limiting speed


Bearing designation


Unit designation

dynamic static

C C0 Pu


33

SKF E2 Y-bearing units with oval flanged composite housing and SKF ConCentra locking method, for metric shaftsd 25 – 35 mm

25 30 15 33.2 63,5 124 99 70 12,3 M10 21,2 40,2 18

30 33 15 37 76,2 142,5 116,5 83 12,3 M10 23,2 43,2 20

35 35 17 39.5 88,9 156 130 96 14,8 M12 24,5 45,5 22

Dimensions

d A1 A2 B11) Da H J L N G s11) T A5

mm ~ ~

A1

d

T

G

J

L

Da H11

A2

3,2 H14 N

Hs1

B1

s1

BH

A5


34

14 7,8 0,335 8 500 0,28 FYTBK 505 E2.YSP 205 SB-2F ECY 205 FYTBK 25 LEF

19,5 11,2 0,475 7 500 0,44 FYTBK 506 E2.YSP 206 SB-2F ECY 206 FYTBK 30 LEF

25,5 15,3 0,655 6 300 0,62 FYTBK 507 E2.YSP 207 SB-2F ECY 207 FYTBK 35 LEF


Limiting speed


Bearing designation


Unit designation

dynamic static

C C0 Pu


35

SKF E2 Y-bearing units with oval flanged composite housing and grub screws, for metric shaftsd 20 – 35 mm

20 29,5 15 31 50,8 112 90 60.5 12,3 M10 18,3 37,3 18,5

25 30 15 34,1 63,5 124 99 70 12,3 M10 19,8 38,8 18

30 33 15 38,1 76,2 142,5 116,5 83 12,3 M10 22,2 42,2 20

35 35 17 42,9 88,9 156 130 96 14,8 M12 25,4 46,4 22

Dimensions

d A1 A2 B Da H J L N G s1 T A5

mm

A1

d

T

G

J

L

Da H11

A2

3,2 H14 N

s1

BH

A5

36

12,7 6,55 0,28 8 500 0,23 FYTBK 504 E2.YAR 204-2F ECY 204 FYTBK 20 TEF

14 7,8 0,335 7 000 0,29 FYTBK 505 E2.YAR 205-2F ECY 205 FYTBK 25 TEF




Limiting speed


Bearing designation


Unit designation

dynamic static

C C0 Pu


37

SKF E2 Y-bearing units with plummer block composite housing and eccentric locking collar, for metric shaftsd 20 – 40 mm

20 32 21 31 64 33,3 16 96 126 17,6 12,4 M10 23,9 18,5

25 32 22 30,9 70,5 36,5 16 105 134 17,6 12,4 M10 23,4 18

30 40 25 35,6 82 42,9 19 121 159 21,4 14,4 M12 26,6 20

35 45 27 38,8 93 47,6 19 126 164 21,4 14,4 M12 29,3 22

40 48 30 43,6 99 49,2 19 136 176 21,4 14,4 M12 33,1 23,5

Dimensions

d A A1 B1 H H1 H2 J L N N1 G s1 A5

mm

H1

A1

d

A

H

H2

G

J

L

N1

Ns1

B1

A5

38

12,7 6,55 0,28 8 500 0,26 SYK 504 E2.YET 204 ECY 204 SYK 20 FE

14 7,8 0,335 7 000 0,31 SYK 505 E2.YET 205 ECY 205 SYK 25 FE



30,7 19 0,8 4 800 0,86 SYK 508 E2.YET 208 ECY 208 SYK 40 FE


Limiting speed


Bearing designation


Unit designation

dynamic static

C C0 Pu


39

SKF E2 Y-bearing units with plummer block composite housing and SKF ConCentra locking method, for metric shaftsd 25 – 40 mm

25 32 22 33,2 70,5 36,5 16 105 134 17,6 12,4 M10 21,2 18

30 40 25 37 82 42,9 19 121 159 21,4 14,4 M12 23,2 20

35 45 27 39,5 93 47,6 19 126 164 21,4 14,4 M12 24,5 22

40 48 30 42,9 99 49,2 19 136 176 21,4 14,4 M12 26,2 23,5

Dimensions

d A A1 B11) H H1 H2 J L N N1 G s11) A5

mm ~ ~

H1

A1

d

A

H

H2

G

J

L

N1

Ns1

B1

A5


40

14 7,8 0,335 8 500 0,30 SYK 505 E2.YSP 205 SB-2F ECY 205 SYK 25 LEF

19,5 11,2 0,475 7 500 0,48 SYK 506 E2.YSP 206 SB-2F ECY 206 SYK 30 LEF

25,5 15,3 0,655 6 300 0,68 SYK 507 E2.YSP 207 SB-2F ECY 207 SYK 35 LEF

30,7 19 0,8 5 600 0,85 SYK 508 E2.YSP 208 SB-2F ECY 208 SYK 40 LEF


Limiting speed


Bearing designation


Unit designation

dynamic static

C C0 Pu


41

SKF E2 Y-bearing units with plummer block composite housing and grub screws, for metric shaftsd 20 – 40 mm

20 32 21 31 64 33,3 16 96 126 17,6 12,4 M10 18,3 18,5

25 32 22 34,1 70,5 36,5 16 105 134 17,6 12,4 M10 19,8 18

30 40 25 38,1 82 42,9 19 121 159 21,4 14,4 M12 22,2 20

35 45 27 42,9 93 47,6 19 126 164 21,4 14,4 M12 25,4 22

40 48 30 49,2 99 49,2 19 136 176 21,4 14,4 M12 30,2 23,5

Dimensions

d A A1 B H H1 H2 J L N N1 G s1 A5

mm

H1

A1

d

A

Hs1

B

H2

G

J

L

N1

N

A5

42

12,7 6,55 0,28 8 500 0,25 SYK 504 E2.YAR 204-2F ECY 204 SYK 20 TEF

14 7,8 0,335 7 000 0,31 SYK 505 E2.YAR 205-2F ECY 205 SYK 25 TEF



30,7 19 0,8 4 800 0,86 SYK 508 E2.YAR 208-2F ECY 208 SYK 40 TEF


Limiting speed


Bearing designation


Unit designation

dynamic static

C C0 Pu


43

The Power of Knowledge EngineeringCombining products, people, and application-specific knowledge, SKF delivers innovative solutions to equipment manufacturers and production facilities in every major industry worldwide. Having expertise in multiple competence areas supports SKF Life Cycle Management, a proven approach to improving equipment reliability, optimizing operational and energy efficiency and reducing total cost of ownership.These competence areas include bearings and units, seals, lubrication systems, mechatronics, and a wide range of services, from 3-D computer modelling to cloud-based condition monitoring and asset management services.SKF’s global footprint provides SKF customers with uniform quality standards and worldwide product availability. Our local presence provides direct access to the experience, knowledge and ingenuity of SKF people.

SKF BeyondZeroSKF BeyondZero is more than our climate strategy for a sustainable environment: it is our mantra; a way of thinking, innovating and acting.For us, SKF BeyondZero means that we will reduce the negative environmental impact from our own operations and at the same time, increase the positive environmental contribution by offering our customers the SKF BeyondZero portfolio of

products and services with enhanced environmental performance characteristics.For inclusion in the SKF BeyondZero portfolio, a product, service or solution must deliver significant environmental benefits without serious environmental trade-offs.SKF Energy Efficient Y-bearings are included in the SKF Beyond Zero portfolio because their low-friction significantly reduces energy use and CO2 emissions.

skf.com | skf.com/yb® SKF and BeyondZero are registered trademarks of the SKF Group.™ SKF EnCompass is a registered trademark of the SKF Group.© SKF Group 2015The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permission is granted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of the use of the information contained herein.PUB BU/P2 12759/4 EN · June 2015Certain image(s) used under license from Shutterstock.com

skf energy efficient y-bearings and units

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